CN103697201B - Valve actuator overload protection arrangement and overload protection method thereof - Google Patents
Valve actuator overload protection arrangement and overload protection method thereof Download PDFInfo
- Publication number
- CN103697201B CN103697201B CN201310652580.8A CN201310652580A CN103697201B CN 103697201 B CN103697201 B CN 103697201B CN 201310652580 A CN201310652580 A CN 201310652580A CN 103697201 B CN103697201 B CN 103697201B
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- Prior art keywords
- valve
- overload protection
- pressure
- flow
- pipeline
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
- F15B20/007—Overload
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
Abstract
The present invention relates to a kind of valve actuator overload protection arrangement and overload protection method thereof, is not good enough for the existing like product structural design of solution.Its main points be this overload protection arrangement casing in after oil and water filters, manual bidirectional valve connect successively, manual bidirectional valve divides two-way pipeline to be connected with forward and backward overload protection assembly respectively, often organizes pressure controlled valve, flow control valve, three-way cock valve in overload protection assembly and connects successively; One road pipeline of pressure controlled valve is connected with three-way cock Fa mono-road pipeline by accessory trachea, and pressure controlled valve, flow control valve are respectively equipped with pilot pressure table and flow pressure table, and oil and water filters is provided with filter pressure table and pressure regulator valve.The connecting base two ends of pressure controlled valve are connected with flow control valve, manual bidirectional valve respectively by the tracheae of pipeline, and the pedestal of connecting base is provided with three through holes, respectively connection control pressure gauge, pressure maintaining valve, flow-adjustable valve.Its overload protection arrangement being suitable as pneumatic actuator in pneumatic valve uses.
Description
Technical field
The present invention relates to the overload protection arrangement of pneumatic actuator, is a kind of valve actuator overload protection arrangement and overload protection method thereof.
Background technique
Pneumatic actuator is generally made up of actuator and controlling mechanism, namely man-operated mechanism, limit switch, solenoid valve, filtering pressure reducing valve, silencing apparatus etc. are comprised, it is connected with pipeline by butterfly valve, pneumatic actuator completes butterfly valve automatically to the unlatching of pipeline or closing operation, and the switch of pneumatic actuator is realized by solenoid-driven limit switch.Its working principle is specially: when pressurized air from A pipe chew enter pneumatic actuator time, gas push gear counterclockwise rotates, and namely valve is opened, and the gas at Pneumatic executive valve two ends chews discharge with B pipe; Otherwise, when pressurized air from B pipe chew enter pneumatic actuator time, gas push gear clockwise direction rotates, and namely valve is closed, and the gas in the middle of pneumatic actuator chews discharge with A pipe.This type of pneumatic actuator is when practical application, and general needs supports the use with overload protection arrangement, thus prevents the excessive damage pneumatic actuator of gas pressure intensity.Existing overload protection valve is as the application number 201310058959.6 disclosed in Chinese patent literature, Shen Qing Publication day 2013.05.22, denomination of invention " the UP modulating valve of band overload protection arrangement ", this UP modulating valve comprises actuator assembly, overload protection arrangement, valve rod assembly, main spring, valve gap, valve component and center bearing bracket, it is characterized in that: the top that actuator assembly is contained in stem member is connected with the upper end of center bearing bracket by screw, center bearing bracket lower end is connected with valve gap upper end, valve gap lower end is connected with valve component, main spring is enclosed within valve gap, stem member to be contained in valve gap and to be connected with valve component, overload protection arrangement is contained on the stem member in center bearing bracket, described overload protection arrangement comprises precompression nut, lining, butterfly spring and packing ring, it prevents the component damaging valve internal because there is overload in system.But the more difficult supporting pneumatic actuator of above-mentioned valve body uses, be more difficultly applicable to various pipe valve, and the pneumatic actuator that different air pressure requires; Meanwhile, its overload atmospheric pressure value regulates comparatively inconvenience, and volume, space hold are large, more difficult repair and replacement.
Summary of the invention
For overcoming above-mentioned deficiency; the object of the invention is to provide a kind of valve actuator overload protection arrangement and overload protection method thereof to related domain; making it solve existing like product, to be suitable for pneumatic actuator limited, assembling, inconvenient maintenance, the technical problem of air pressure, Flow-rate adjustment complexity.Its objective is and to be achieved through the following technical solutions.
A kind of valve actuator overload protection arrangement, be provided with positive and negative two-way pipeline in the casing of this overload protection arrangement, one end of positive and negative two-way pipeline connects the positive and negative rotation suction port of pneumatic actuator respectively, and the other end connects air supply source simultaneously; Described positive and negative two-way pipeline is performed by the oil and water filters in casing, three-way cock valve, flow control valve, pressure controlled valve, manual bidirectional valve, described oil and water filters is provided with filter pressure table, described three-way cock valve, flow control valve, pressure controlled valve are combined into one group of overload protection assembly, and two groups of overload protection assemblies are combined into forward and backward overload protection assembly; Its structural design main points are that a road pipeline tracheae of described air supply source is connected with the oil and water filters in casing; oil and water filters is connected with manual bidirectional valve by the tracheae of same road pipeline; the tracheae that manual bidirectional valve separates two-way pipeline is connected with described two groups of overload protection assemblies respectively, and two groups of overload protection assemblies are connected with the positive and negative rotation suction port of pneumatic actuator by the tracheae of this two-way pipeline.Above-mentioned oil and water filters filters for the profit entered in casing pipeline and is separated, thus is convenient in gas entrance; Manual bidirectional valve is used for the handover operation of forward and backward in pipeline; Overload protection assembly is used for the overload protection of positive and negative two-way pipeline, and forward and backward pipeline promotes the output of pneumatic actuator forward and backward gas.
The pressure controlled valve of described overload protection assembly, flow control valve, three-way cock valve are connected successively by the air outlet end of manual bidirectional valve end to casing; pressure controlled valve, flow control valve are respectively equipped with pilot pressure table and flow pressure table, and a road pipeline of pressure controlled valve is connected with three-way cock Fa mono-road pipeline by accessory trachea.The connection order of pressure controlled valve, flow control valve, three-way cock valve, and the connection of accessory trachea between pressure controlled valve and three-way cock valve, ensure that gas is by entering into output procedure, first stablize air pressure, control flow again, export finally by three-way cock valve or be back to flow control valve.
The connecting base two ends of described pressure controlled valve are connected with flow control valve, manual bidirectional valve respectively by the tracheae of pipeline, and the pedestal of connecting base is provided with three through holes, respectively connection control pressure gauge, pressure maintaining valve, flow-adjustable valve; Described oil and water filters is provided with pressure regulator valve.The pressure maintaining valve of pressure controlled valve, flow-adjustable valve are respectively used to voltage stabilizing and the Flow-rate adjustment of gas in pressure controlled valve; The pressure regulator valve of oil and water filters is used for the gas pressure regulation after oil and water filters.
The flow-adjustable valve body of described flow-adjustable valve is provided with flow-adjustable valve bar, and the flow-adjustable valve bar external diameter between flow-adjustable valve bar and flow-adjustable valve body is provided with valve stem packing ring.Namely by rotating the gas flow in flow-adjustable valve bar regulation valve body; Meanwhile, this flow-adjustable valve also can adopt other existing flow-adjustable valve.
The external diameter sidewall of the valve body central through bore of described pressure maintaining valve is provided with female joint, and female joint is connected with three-way cock Fa mono-road pipeline by pipe joint, accessory trachea.Said structure is Placement concrete between pressure maintaining valve and three-way cock valve and structure, when namely pressure maintaining valve internal air pressure is too high, is back to flow control valve by accessory trachea, three-way cock valve.
Be provided with spool, spring, adjustment plug screw in the valve body of described pressure maintaining valve, valve body is stretched out in described adjustment plug screw one end, and is fixed on valve body by the aperture place spelling cap of valve body central through bore; One end of spring offsets with regulating the other end of plug screw, and the other end of spring and one end of spool offset, and the other end of spool is provided with piston, regulates the adjustment plug screw external diameter between plug screw and valve body to be provided with plug screw seal ring.Said structure is the concrete structure of valve body inner spool, and it is conducive to sealing in pressure maintaining valve, voltage stabilizing and pressure buffer; Meanwhile, this pressure maintaining valve also can adopt other existing pressure maintaining valve.
The two ends of described spring are arranged in the spring groove of adjustment plug screw, spool opposing end surface respectively.Said structure is convenient to the location of spring in valve body, thus improves the stability of spring further.
According to said structure feature, the feature of its overload protection method is that the gas after described oil and water filters oil-water separation is through the actuating of manual bidirectional valve, control enters and rotates forward overload protection assembly or reversion overload protection assembly, thus exports the forward or reverse of gas-powered pneumatic actuator; Meanwhile, cross gas carrier to reflux in the overload protection assembly of correspondence.Gas backstreaming structure in above-mentioned overload protection assembly, is a kind of overload protecting mechanism, and when overload protection group part internal air pressure is excessive, gas Self-tipping refluxes, and forms loop.
Being connected successively by the air outlet end of manual bidirectional valve end to casing back up through pressure controlled valve, flow control valve, three-way cock valve in described overload protection assembly, accessory trachea two ends are Bonding pressure control valve, three-way cock valve respectively; Meanwhile, be provided with flow-adjustable valve and pressure maintaining valve in pressure controlled valve, namely in the connecting base of pressure controlled valve, gas passes through the flow-adjustable valve bar adjust flux of flow-adjustable valve, by the valve body inner spool voltage stabilizing of pressure maintaining valve; When the valve body internal air pressure of pressure maintaining valve is excessive, gas push spool moves to adjustment plug screw, spring generation deformation, and the female joint through hole of spool place valve body is opened, gas enters three-way cock valve by female joint, pipe joint, accessory trachea, is back to flow control valve by three-way cock valve; The valve body internal air pressure of pressure maintaining valve reduces, and spool is resetted by spring action, and the spool place female joint through hole of valve body is closed.Said structure is concrete return-flow structure and the mode of overload protection assembly, relates to pressure maintaining valve and the flow-adjustable valve of pressure controlled valve, and the pressure controlled valve of accessory trachea, backflow utilization between three-way cock valve and overload protection.
Structural design advantages of simple of the present invention, uses, assembling, easy to maintenance, and stability, Security, overload protection are effective; The overload protection arrangement being suitable as pneumatic actuator in pneumatic valve uses, ex hoc genus anne the architecture advances of product.
Accompanying drawing explanation
Fig. 1 is using state structural representation of the present invention, and in figure, A portion has done to confine.
Fig. 2 is the A portion structure for amplifying schematic diagram of Fig. 1.
Fig. 3 is pressure controlled valve sectional structure schematic diagram one of the present invention.
Fig. 4 is pressure controlled valve sectional structure schematic diagram two of the present invention.
In figure, the name of sequence number is called: 1, casing, 2, oil and water filters, 3, three-way cock valve, 4, accessory trachea, 5, flow control valve, 6, pressure controlled valve, 601, connecting base, 602, flow-adjustable valve body, 603, flow-adjustable valve bar, 604, valve body, 605, spell cap, 606, regulate plug screw, 607, spring, 608, spool, 609, piston, 610, female joint, 611, pipe joint, 7, manual bidirectional valve.
Embodiment
Now by reference to the accompanying drawings, the invention will be further described.As shown in Figure 1 to 4; oil and water filters 2, three-way cock valve 3, flow control valve 5, pressure controlled valve 6, manual bidirectional valve 7 is provided with in the casing 1 of this overload protection arrangement; one end of positive and negative two-way pipeline in casing connects the positive and negative rotation suction port of pneumatic actuator respectively, and the other end connects air supply source simultaneously.Namely after oil and water filters, manual bidirectional valve connect successively, manual bidirectional valve divides that two-way pipeline rotates forward overload protection assembly respectively with one group, one group of overload protection assembly that reverses is connected, and often organizes pressure controlled valve, flow control valve, three-way cock valve in overload protection assembly and is connected by the air outlet end of manual bidirectional valve end to casing successively; Meanwhile, a road pipeline of pressure controlled valve is connected with three-way cock Fa mono-road pipeline by accessory trachea 4, and pressure controlled valve, flow control valve are respectively equipped with pilot pressure table and flow pressure table, and oil and water filters is provided with filter pressure table and pressure regulator valve.
The concrete structure of pressure controlled valve is: connecting base 601 two ends of pressure controlled valve are connected with flow control valve, manual bidirectional valve respectively by the tracheae of pipeline, and the pedestal of connecting base is provided with three through holes, respectively connection control pressure gauge, pressure maintaining valve, flow-adjustable valve.The flow-adjustable valve body 602 of flow-adjustable valve is provided with flow-adjustable valve bar 603, and the flow-adjustable valve bar external diameter between flow-adjustable valve bar and flow-adjustable valve body is provided with valve stem packing ring; The external diameter sidewall of valve body 604 central through bore of pressure maintaining valve is provided with female joint 610, and female joint is connected with three-way cock Fa mono-road pipeline by pipe joint 611, accessory trachea; Be provided with spool 608, spring 607 in the valve body of pressure maintaining valve, regulate plug screw 606, valve body is stretched out in described adjustment plug screw one end, and is fixed on valve body by the aperture place spelling cap 605 of valve body central through bore; One end of spring offsets with regulating the other end of plug screw, and the other end of spring and one end of spool offset, and namely the two ends of spring are arranged in the spring groove of adjustment plug screw, spool opposing end surface respectively; The other end of spool is provided with piston 609, regulates the adjustment plug screw external diameter between plug screw and valve body to be provided with plug screw seal ring.
Its design principle is as follows: when the pneumatic actuator of pneumatic valve runs well, stable gas pressure, and throughput is stablized; Pneumatic actuator running is closed up to pneumatic valve or is unlocked, when exceeding pneumatic valve working torque forces, pneumatic actuator running speed slows down, and throughput reduces, and air pressure increases, control valve is opened, flow to three-way cock valve, the air inlet of three-way cock valve is closed, and source of the gas is cut off, pneumatic actuator is died, ensures that pneumatic valve can not be turned round bad.In said process, pipeline source of the gas air pressure is within the scope of 1.0MPa.Its working principle is as follows: gas enters this overload protection arrangement of rear discharge from the oil and water seperator in casing, manual bidirectional valve, pressure controlled valve, flow control valve, three-way cock valve successively; and split into two groups of overload protection assemblies at manual bidirectional valve; two groups of overload protection assemblies are one group are formed by pressure controlled valve, flow control valve, three-way cock valves respectively, and namely overload protection assembly is divided into forward and backward overload protection assembly.Pneumatic actuator operating air pressure is at 0.4MPa-0.45MPa; The pressure regulator valve of oil and water seperator makes air pressure adjustment at 0.7MPa ~ 0.75MPa; Manual bidirectional valve is used for forward and backward operation; Flow control valve in the running, regulates pressure to be greater than in pressure maintaining valve 0.3 ~ 0.35MPa, can promote pressure controlled valve; Pressure controlled valve air pressure is elevated to 0.5-0.7MPa and can be opened, and flow to three-way cock valve; Three-way cock valve is stopped final controlling element air feed.Above-mentioned forward and backward overload protection assembly is each one group, can play unlatching, close protective action.
The present invention prevents the component damaging valve internal because there is air pressure overload in pipeline, improves Safety performance, can be widely used in the industry such as pharmacy, chemical industry; And petrochemical industry can be solved in the pneumatic actuator using pneumatic valve, there is no the problem of overload protection arrangement, thus the generation of minimizing accident, fill up the blank of this art domestic.
Claims (9)
1. a valve actuator overload protection arrangement, positive and negative two-way pipeline is provided with in the casing (1) of this overload protection arrangement, one end of positive and negative two-way pipeline connects the positive and negative rotation suction port of pneumatic actuator respectively, and the other end connects air supply source simultaneously; Described positive and negative two-way pipeline is performed by the oil and water filters (2) in casing, three-way cock valve (3), flow control valve (5), pressure controlled valve (6), manual bidirectional valve (7), described oil and water filters is provided with filter pressure table, described three-way cock valve, flow control valve, pressure controlled valve are combined into one group of overload protection assembly, and two groups of overload protection assemblies are combined into forward and backward overload protection assembly; It is characterized in that a road pipeline tracheae of described air supply source is connected with the oil and water filters (2) in casing (1); oil and water filters is connected with manual bidirectional valve (7) by the tracheae of same road pipeline; the tracheae that manual bidirectional valve separates two-way pipeline is connected with described two groups of overload protection assemblies respectively, and two groups of overload protection assemblies are connected with the positive and negative rotation suction port of pneumatic actuator by the tracheae of this two-way pipeline.
2. valve actuator overload protection arrangement according to claim 1; it is characterized in that the pressure controlled valve (6) of described overload protection assembly, flow control valve (5), three-way cock valve (3) hold the air outlet end to casing to connect successively by manual bidirectional valve (7); pressure controlled valve, flow control valve are respectively equipped with pilot pressure table and flow pressure table, and a road pipeline of pressure controlled valve is connected with three-way cock Fa mono-road pipeline by accessory trachea (4).
3. valve actuator overload protection arrangement according to claim 2, it is characterized in that connecting base (601) two ends of described pressure controlled valve (6) are connected with flow control valve (5), manual bidirectional valve (7) respectively by the tracheae of pipeline, the pedestal of connecting base is provided with three through holes, respectively connection control pressure gauge, pressure maintaining valve, flow-adjustable valve; Described oil and water filters (2) is provided with pressure regulator valve.
4. valve actuator overload protection arrangement according to claim 3; it is characterized in that the flow-adjustable valve body (602) of described flow-adjustable valve is provided with flow-adjustable valve bar (603), the flow-adjustable valve bar external diameter between flow-adjustable valve bar and flow-adjustable valve body is provided with valve stem packing ring.
5. valve actuator overload protection arrangement according to claim 3; it is characterized in that the external diameter sidewall of valve body (604) central through bore of described pressure maintaining valve is provided with female joint (610), female joint is connected with a road pipeline of three-way cock valve (3) by pipe joint (611), accessory trachea (4).
6. valve actuator overload protection arrangement according to claim 3, be provided with spool (608), spring (607) in the valve body (604) that it is characterized in that described pressure maintaining valve, regulate plug screw (606), valve body is stretched out in described adjustment plug screw one end, and is fixed on valve body by aperture place spelling cap (605) of valve body central through bore; One end of spring offsets with regulating the other end of plug screw, and the other end of spring and one end of spool offset, and the other end of spool is provided with piston (609), regulates the adjustment plug screw external diameter between plug screw and valve body to be provided with plug screw seal ring.
7. valve actuator overload protection arrangement according to claim 6, is characterized in that the two ends of described spring (607) are arranged in the spring groove of adjustment plug screw (606), spool (608) opposing end surface respectively.
8. the overload protection method of a valve actuator overload protection arrangement according to claim 1, it is characterized in that the gas after described oil and water filters (2) oil-water separation is through manual bidirectional valve (7) actuating, control enters and rotates forward overload protection assembly or reversion overload protection assembly, thus exports the forward or reverse of gas-powered pneumatic actuator; Meanwhile, cross gas carrier to reflux in the overload protection assembly of correspondence.
9. the overload protection method of valve actuator overload protection arrangement according to claim 8, it is characterized in that being connected successively by the air outlet end of manual bidirectional valve (7) end to casing back up through pressure controlled valve (6), flow control valve (5), three-way cock valve (3) in described overload protection assembly, accessory trachea (4) two ends are Bonding pressure control valve, three-way cock valve respectively; Simultaneously, flow-adjustable valve and pressure maintaining valve is provided with in pressure controlled valve, namely in the connecting base (601) of pressure controlled valve, gas passes through flow-adjustable valve bar (603) adjust flux of flow-adjustable valve, by valve body (604) inner spool (608) voltage stabilizing of pressure maintaining valve; When the valve body internal air pressure of pressure maintaining valve is excessive, gas push spool is mobile to adjustment plug screw (606), there is deformation in spring (607), female joint (610) through hole of spool place valve body is opened, gas enters three-way cock valve by female joint, pipe joint (611), accessory trachea, is back to flow control valve by three-way cock valve; The valve body internal air pressure of pressure maintaining valve reduces, and spool is resetted by spring action, and the spool place female joint through hole of valve body is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310652580.8A CN103697201B (en) | 2013-12-05 | 2013-12-05 | Valve actuator overload protection arrangement and overload protection method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310652580.8A CN103697201B (en) | 2013-12-05 | 2013-12-05 | Valve actuator overload protection arrangement and overload protection method thereof |
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| Publication Number | Publication Date |
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| CN103697201A CN103697201A (en) | 2014-04-02 |
| CN103697201B true CN103697201B (en) | 2015-12-16 |
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| CN201310652580.8A Expired - Fee Related CN103697201B (en) | 2013-12-05 | 2013-12-05 | Valve actuator overload protection arrangement and overload protection method thereof |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107218468A (en) * | 2016-03-21 | 2017-09-29 | 淄博柴油机总公司 | Multifunctional combustible gas valve member unit |
| CN107816407B (en) * | 2017-10-24 | 2019-11-26 | 瑞安市宏创科技有限公司 | A kind of antioverloading hydroelectric power generating apparatus |
| CN108035886A (en) * | 2017-12-30 | 2018-05-15 | 唐守林 | A kind of floatation type water plug |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5056374A (en) * | 1988-03-15 | 1991-10-15 | Westinghouse Electric Corporation | Quickly installed load measuring apparatus and associated system |
| CN102518858A (en) * | 2011-12-07 | 2012-06-27 | 珠海经济特区科茂橡塑材料有限公司 | Air pressure overload protection device |
| CN103115171A (en) * | 2013-02-26 | 2013-05-22 | 上海赛凌自控设备有限公司 | Universal pressure regulating valve with overload protection device |
| CN203641599U (en) * | 2013-12-05 | 2014-06-11 | 高国平 | Valve executor overload protecting device |
-
2013
- 2013-12-05 CN CN201310652580.8A patent/CN103697201B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5056374A (en) * | 1988-03-15 | 1991-10-15 | Westinghouse Electric Corporation | Quickly installed load measuring apparatus and associated system |
| CN102518858A (en) * | 2011-12-07 | 2012-06-27 | 珠海经济特区科茂橡塑材料有限公司 | Air pressure overload protection device |
| CN103115171A (en) * | 2013-02-26 | 2013-05-22 | 上海赛凌自控设备有限公司 | Universal pressure regulating valve with overload protection device |
| CN203641599U (en) * | 2013-12-05 | 2014-06-11 | 高国平 | Valve executor overload protecting device |
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Effective date of registration: 20151028 Address after: The camel streets in Zhenhai District of Zhejiang Province in 315200 Xingfeng village in Ningbo City Applicant after: GAO GUOPING Address before: 315200 village, 35 village, camel street, Zhenhai District, Zhejiang, Ningbo Applicant before: Gao Guoping |
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